DECstation2040

rscott2049·DECstation2040·emu_brd_rev_1.5/emu_brd.kicad_pcb

About the DECstation2040 PCB

DECstation2040 is an open source RP2040/RP2350 PCB design by rscott2049, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 52 × 90 mm, with 56 components from 26 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the TLV751180330PDSQR, W25LQ64E, PSRAM_32M, TXS0108ERGYR and TXV0106BQBR. By type, the board carries 23 capacitors, 14 resistors, 10 connectors, 6 ICs, 2 jumpers and 1 crystal.

From the project

A RP2040 based DECstation emulator

This document outlines the DECstation 2040, a RP2040 based DECstation 3000 emulator that can run DECWindows. A summary of features:

- RP2040, running at 1.8v/300 MHz - 32 MB of PSRAM - 8 MB SPI flash - uSD card socket - Monochrome VGA at 1024 x 864 - Ethernet RMII PHY support (socket on rev 1.5, integrated in rev 2.1)

- 4 port PSRAM PIO engine - PIO driven VGA, with seperate 16x16 cursor plane overlay - USB HID to DECWindows keyboard and mouse

DECstation2040, from the project README — From the project README

Main components on the DECstation2040

TLV751180330PDSQR W25LQ64E RP2040 PSRAM_32M TXS0108ERGYR TXV0106BQBR

DECstation2040 bill of materials (BOM)

56 components, 26 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	TLV751180330PDSQR Texas Instruments	SON40P200X200X80-11N	U1
1	W25LQ64E	WIN_ZP-8_WIN	U2
1	RP2040	RP2040-QFN-56	U3
1	PSRAM_32M	BGA25C100P5X5_800X600X120N	U4
1	TXS0108ERGYR	RGY20_3P05X2P05	U5
1	TXV0106BQBR	DHVQFN-16-1EP_2.5x3.5mm_P0.5mm_EP1x2mm	U7
1	ABLS-12.000MHZ-B4-T	Crystal_SMD_5032-2Pin_5.0x3.2mm_HandSoldering	Y1
1	Conn_01x06	PinHeader_1x06_P2.54mm_Vertical	J1
2	Conn_01x02	PinHeader_1x02_P2.54mm_Vertical	J2, J8
4	Conn_01x03	PinHeader_1x03_P2.54mm_Vertical	J3, J6, J7, J10
1	Micro_SD_Card_Det_Hirose_DM3AT	microSD_HC_Hirose_DM3D-SF	J4
1	Conn_02x07_Odd_Even	PinSocket_2x07_P2.54mm_Horizontal	J5
1	USB_C_Plug_USB2.0	PCB-USB-C	P1
2	SolderJumper_2_Bridged	SolderJumper-2_P1.3mm_Bridged_Pad1.0x1.5mm	JP3, JP4
5	10u	C_0805_2012Metric	C1, C2, C3, C17, C19
2	27p	C_0603_1608Metric	C4, C5
14	100n	C_0603_1608Metric	C6, C7, C8, C9, C11, C12, C13, C14 +6
2	1u	C_0603_1608Metric	C10, C18
1	DNF	C_0603_1608Metric	R1
2	1k	C_0603_1608Metric	R2, R5

Show 6 more

Qty	Part	Footprint	Refs
2	27	C_0603_1608Metric	R3, R4
3	10K	R_0603_1608Metric	R6, R8, R12
1	DNP	R_0603_1608Metric	R7
3	280	R_0603_1608Metric	R9, R10, R11
1	22K	R_0603_1608Metric	R13
1	5.1K	R_0603_1608Metric	R14

DECstation2040 design files

The KiCad project lives in the rscott2049/DECstation2040 repository on GitHub; these links point at the commit this page was built from.

Layoutemu_brd_rev_1.5/emu_brd.kicad_pcb
Schematicemu_brd_rev_1.5/emu_brd.kicad_sch
BOMdoc/bom/emu_brd_v2.1.xlsx

DECstation2040: common questions

What microcontroller does the DECstation2040 use?

The DECstation2040 is built around the RP2040, from the RP2040/RP2350 family.

How big is the DECstation2040 PCB?

The DECstation2040 measures 52 × 90 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the DECstation2040?

56 components, from 26 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the DECstation2040 design files?

From the rscott2049/DECstation2040 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the DECstation2040 design in my own project?

Yes, under the terms of its BSD-3-Clause license, which rscott2049 chose for the repository.

Can I test firmware for the DECstation2040 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.